To Edit an Attached Item Type

Select the desired element and right-click.

Select Edit Item Type from the reset pop-up menu.

The Edit Item Type dialog opens.

Select the desired Item type from the Item drop-down menu.

Select the desired property definition to edit from the list displayed in the group.

(Optional) Search for the required property definition.

The property definition displays in the group section.

Make desired changes to the property definitions and select Update.